<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <script>
    class User {
      name = '123'
      constructor(params) {
        console.log('params', params);
        this.name = params
      }
      get name() {
        return this.name
      }
      set name(val) {
        this.name = val
      }
    }
    let user = new User('smd')
    console.log(user.name)
  </script>
</body>

</html>